Malaga Costa del Sol International Airport (AGP) is the closest airport, only 30 km away from the property, and is served by many airlines : regular such as Iberia, Air France, Bruxelles Airline, Luftansa, BA and also low-cost airlines such as Ryanair, EasyJet, Jet2, BMI and Monarch.
The taxi line is outside the arrivals hall: the approximate cost is 40 Euros and takes more or less 20 minutes.
Bus: Buses towards Marbella depart from a stop outside the arrivals hall twice an hour (6.30am to 11.30pm), and will have a mandatory stop in La Cala de Mijas cost around €7 one way (Autobuses Portillo http://www.ctsa-portillo.es).
Train/Bus Combo: The new underground train station in Terminal 3. You can buy a ticket on the train. Trains run twice an hour to Fuengirola train station. From there you have to walk to the bus station across the street (around 60meters), and catch the bus towards Marbella. See link above for the schedule.
Car Rental: It is better to schedule your car rental ahead of time, to get the best promotion (www.economycarhire, www.kayak or your airline's site).
Shuttle service: There is also a shuttle service proposed at around 20€ one way. (http://www.shuttledirect)